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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through January 17, 2010 » Suddenly blowing upshifts « Previous Next »

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Marcodesade
Posted on Wednesday, January 13, 2010 - 10:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I just had my 12K service a few weeks ago. And for the past few days, I notice that, when I first get rolling, I'm blowing the upshift shift into 3rd (only). It's not like I'm finding a false neutral; it feels like it engages, but when I let out the clutch the revs wind up because I'm still in second. It sometimes happens 2 or 3 times in a row --- but always when I reach 3rd for the first time; after that it doesn't happen again (even if I park the bike for a while).

Does this sound familiar to anybody? It's never happened to me before this week . . .
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Carbonbigfoot
Posted on Wednesday, January 13, 2010 - 11:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did you maybe change boots, or adjust the shifter? Or did the dealership move it when they reassembled? Does that even need to come off?

Just thoughts....

R
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Thefleshrocket
Posted on Wednesday, January 13, 2010 - 11:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Have you tried adjusting your shifter so it's lower down (closer to the top of your foot)? Maybe you're just not getting the lever pushed up enough when shifting.

If it's not operator error, it's probably a bent shift fork or worn gear engagement dogs. Both of which probably require removing the transmission to accomplish.
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Marcodesade
Posted on Thursday, January 14, 2010 - 09:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks, guys.

Carbon, I didn't personally change anything, and it doesn't FEEL like it was moved.

Flesh, the lever feels like it's in a good place for me --- perhaps because it's always been in this position and I've gotten comfortable with it there. In any case, I'm going to assess for "operator error" when I ride today. It sure doesn't seem like that's the case though.

So if it is a bent shift for or worn gear engagement dogs, what might cause these conditions? When you say "Both of which probably require removing the transmission to accomplish" do you mean that's how the damage happened? Or that's what it's going to take to fix it? The transmission has not, to my knowledge, been disassembled. Would my warranty likely cover this repair, or are these "wear items?"

Thanks!
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Jdugger
Posted on Thursday, January 14, 2010 - 10:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The other thing to check is that you are completely releasing the lever. If you shift but never let the lever come completely back to the neutral position, it won't give you a change to pick up the next gear.
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Carbonbigfoot
Posted on Thursday, January 14, 2010 - 10:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Best thing is to ride it a bit, and be really decisive (not necessarily aggressive...) with the 2-3 shift, and see if it can be reproduced.

Did they change brands of oil?

R
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Xb12s_streetdemon
Posted on Thursday, January 14, 2010 - 10:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

does the 1125 have a primary adjustment like the xb's. i havent looked at mine cause i left it at the dealership till its warm enough to ride home. anyway,when i would miss shifts on the xb i would adjust the tensioner bolt and it would be back to shifting smooth. so does the 1125 have the same type of adjustment? if so, that might be the problem.
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Froggy
Posted on Thursday, January 14, 2010 - 10:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No primary adjustments, as instead of a primary chain the transmission input is gear driven from the crank.
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Marcodesade
Posted on Thursday, January 14, 2010 - 01:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

JD: I'll have to monitor myself to make sure that I'm not lingering on the clutch in the shift. I'm pretty good at staying off the clutch while driving my car, but I'm not 100% sure I've been as conscientious while riding.

Carbon: although I've been playing with the idea of moving to another oil, as of now it reamains Syn3.

Can someone answer the questions I had in my previous post please:

So if it is a bent shift for or worn gear engagement dogs, what might cause these conditions? When you say "Both of which probably require removing the transmission to accomplish" do you mean that's how the damage happened? Or that's what it's going to take to fix it? The transmission has not, to my knowledge, been disassembled. Would my warranty likely cover this repair, or are these "wear items?"}
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Jules
Posted on Thursday, January 14, 2010 - 01:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

They're internal components within the gearbox, dropping the bike onto the gear selector could "possibly" bend the gear selector fork (but you'd know if that's happened by the associated damage to the panels). You can also do it by trying to force the bike into gear when it doesn't want to (not synched correctly) or potentially by trying to collect either "gear 7" in a 6 gear box or by trying to select a gear lower than 1... Or riding with your foot pressed hard onto the selector arm for a long time..

It's EXTREMELY unlikely that the engagement dogs would be worn at that low mileage assuming they's been assembled correctly at the factory and you don't habitually ride with your foot on top of the selector..
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Bob_thompson
Posted on Thursday, January 14, 2010 - 02:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"after that it doesn't happen again (even if I park the bike for a while)"

Mark, just a thought; something that comes to mind with having your service done and the statement above is; engine warm up especially if the service dept. you delt with put a different oil in when refilling it if they in fact did an oil change. If its a heavier or different oil maybe the engine/trans.(same oil) needs to warm up a little longer. Mine always shifts better after a through warm up in any weather even with Mobil 1. Bob
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